E1M1

I was gifted the Game Engine Black Book DOOM for Christmas, to my
great pleasure. It will let me finally satisfy the curiosity that has been
lingering in me since '93. And I suspect it is not entirely without some
expectation that I get this book now, after having recreated the rendering
engine from Wolfenstein 3D in a live-coding session at RevolverConf
2018.1.

My primary goal here is to implement a rendering engine of the same kind that
Doom sports. But I should note that this will be for my educational benefit,
so there is no point in taking shortcuts or arriving at the goal as quickly as
possible. And this is not going to be quick no matter what.

So, I'll attack it piecemeal. I'll try to identify steps I can take along
the way that will bring me closer to the rendering engine, but will not
require me to set aside extended periods of concentration. Those are in short
supply.